What's more, part of that itPass4sure JavaScript-Developer-I dumps now are free: https://drive.google.com/open?id=1N-TOJinX1R6lp8sXO5_rOgJV9uerbWs6
These people who used our products have thought highly of our JavaScript-Developer-I study materials. If you decide to buy our products and tale it seriously consideration, we can make sure that it will be very easy for you to simply pass your exam and get the JavaScript-Developer-I certification in a short time. We are also willing to help you achieve your dream. Now give youself a chance to have a try on our JavaScript-Developer-I Study Materials. You will have no regret spending your valuable time on our JavaScript-Developer-I learning guide.
| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-001 |
| Exam Format: | Multiple Select, Multiple Choice |
| Real Exam Qty: | 60 |
| Related Certifications: | Salesforce Certified Platform Developer I Salesforce Certified Platform App Builder Salesforce Certified JavaScript Developer I |
| Certificate Validity Period: | 1 year (maintenance required via Salesforce certification maintenance modules) |
| Passing Score: | 65% |
| Exam Price: | USD 200 (may vary by region/tax) |
| Available Languages: | English |
| Exam Duration: | 105 minutes |
| Recommended Training: | Salesforce Developer Learning Paths Salesforce Trailhead JavaScript Developer I Prep |
| Exam Registration: | Salesforce Credentials Page Salesforce Certification Registration (Webassessor) |
| Sample Questions: | Salesforce JavaScript-Developer-I Sample Questions |
| Exam Way: | Online proctored or onsite testing via Kryterion Webassessor |
| Pre Condition: | No formal prerequisites, but familiarity with JavaScript and Salesforce platform development is strongly recommended. |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/javascriptdeveloper1 |
>> JavaScript-Developer-I Instant Discount <<
In order to meet the different need from our customers, the experts and professors from our company designed three different versions of our JavaScript-Developer-I exam questions for our customers to choose, including the PDF version, the online version and the software version. Though the content of these three versions is the same, the displays have their different advantages. With our JavaScript-Developer-I Study Materials, you can have different and pleasure study experience as well as pass JavaScript-Developer-I exam easily.
Salesforce JavaScript-Developer-I exam is designed for candidates who have a good understanding of JavaScript programming language and its applications in Salesforce. JavaScript-Developer-I exam measures the candidate's knowledge in different areas, such as Apex, Visualforce, and Lightning components. It tests the candidate's ability to design and implement client-side and server-side logic, create custom user interfaces, and integrate with external systems using JavaScript.
In order to prepare for the Salesforce JavaScript-Developer-I Exam, developers must have a strong understanding of JavaScript and its various frameworks and libraries. They should also be familiar with the Salesforce platform and its various features, such as Apex code and Visualforce pages. With the right preparation and study materials, developers can pass the exam and earn their certification, opening up new opportunities and career paths within the Salesforce ecosystem.
NEW QUESTION # 130
Refer to the following code (correcting the missing template literal backticks):
let codeName = ' Bond ' ;
let sampleText = `The name is ${codeName}, Jim ${codeName}`;
A developer is trying to determine if a certain substring is part of a string.
Which three code statements return true?
Answer: A,C,D
Explanation:
First, compute sampleText:
let codeName = ' Bond ' ;
let sampleText = `The name is ${codeName}, Jim ${codeName}`;
The template literal evaluates to:
" The name is Bond, Jim Bond "
Now evaluate each statement:
Option A: sampleText.includes( ' Jim ' );
* String.prototype.includes(substring) returns true if substring occurs anywhere in the string.
* sampleText clearly contains " Jim " ( " The name is Bond, Jim Bond " ).
* So this returns true.
Option B: sampleText.includes( ' The ' , 1);
* includes(searchString, position) starts searching from the given position index.
* " The name is Bond, Jim Bond " has " The " starting at index 0.
* Starting search at index 1 means " The " at index 0 is not considered, and there is no second " The " .
* So this returns false.
Option C: sampleText.includes( ' Jim ' , 4);
* " Jim " appears after " The name is Bond, " which is longer than 4 characters; the index of " Jim " is well past 4.
* So when searching from index 4, " Jim " is still found.
* This returns true.
Option D: sampleText.indexOf( ' Bond ' ) !== -1;
* String.prototype.indexOf(substring) returns:
* -1 if the substring is not found,
* Otherwise, the starting index of the first occurrence.
* " Bond " appears twice in " The name is Bond, Jim Bond " .
* So sampleText.indexOf( ' Bond ' ) is some non-negative index (for the first occurrence).
* Therefore indexOf( ' Bond ' ) !== -1 is true.
Option E: sampleText.substring( ' Jim ' );
* substring expects numeric indexes: substring(startIndex, endIndex?).
* If given a string " Jim " as the argument, JavaScript coerces it to a number:
* Number( ' Jim ' ) # NaN
* NaN for startIndex is treated as 0.
* So sampleText.substring( ' Jim ' ) is effectively sampleText.substring(0), which returns the full string " The name is Bond, Jim Bond " .
* This is a string , not a boolean. The question asks "which code statements return true?"
* This statement returns a string, not the boolean value true.
Thus, the three statements that actually return true (boolean) are:
The answer: A, C, D
Study Guide / Concept References (no links):
* Template literals and ${} interpolation
* String.prototype.includes(searchString, position?)
* String.prototype.indexOf(substring) and checking for !== -1
* String.prototype.substring(start, end?) and argument coercion
* Boolean vs non-boolean return types in string methods
NEW QUESTION # 131
A developer is setting up a new Node.js server with a client library that is built using events and callbacks.
The library:
* Will establish a web socket connection and handle receipt of messages to the server
* Will be imported with require, and made available with a variable called we.
The developer also wants to add error logging if a connection fails.
Given this info, which code segment shows the correct way to set up a client with two events that listen at execution time?
Answer: D
Explanation:
} catch(error) { console.log('ERROR' , error); };
}
NEW QUESTION # 132
Refer to the code:
Given the code above, which three properties are set for pet1? Choose 3 answers
Answer: A,B,D
NEW QUESTION # 133
Which javascript methods can be used to serialize an object into a string and deserialize a JSON string into an object, respectively?
Answer: C
NEW QUESTION # 134
Refer to following code:
class Vehicle {
constructor(plate) {
This.plate =plate;
}
}
Class Truck extends Vehicle {
constructor(plate, weight) {
//Missing code
This.weight = weight;
}
displayWeight() {
console.log('The truck ${this.plate} has a weight of ${this.weight} lb.');}}
Let myTruck = new Truck('123AB', 5000);
myTruck.displayWeight();
Which statement should be added to line 09 for the code to display 'The truck 123AB has a
weight of 5000lb.'?
Answer: A
NEW QUESTION # 135
......
Exam JavaScript-Developer-I Cram Questions: https://www.itpass4sure.com/JavaScript-Developer-I-practice-exam.html
What's more, part of that itPass4sure JavaScript-Developer-I dumps now are free: https://drive.google.com/open?id=1N-TOJinX1R6lp8sXO5_rOgJV9uerbWs6